Wireless Door Bells

[imroberts]

I currently have a door bell with an apparent 50m range. Now I know this means 50m line of sight in the middle of a field, however this barely reaches 10m within my property and is very unreliable.

As such I was looking at a better door bell, probably one with a 200m range.

I notice some work on 433MHz and some work on 868MHz. My physics knowledge that I have vaguely remembered tells me that higher or lower frequencies will penetrate walls more successfully... have I remembered this right? And if so, do I want a lower or higher frequency bell?

 

[breezer]

higher (i think) but the question is, how old is your house? most houses now have plasterboard walls which is foil backed, this cuts a lot of signal down.

 

[vernerbongo2]

higher (i think) but the question is, how old is your house? most houses now have plasterboard walls which is foil backed, this cuts a lot of signal down.

I tried a couple of wireless door bells years ago and didn't think much of them. I had to keep replacing the batteries at short intervals to get it to work.
just forgot about it all together